Adjustable lettering pen for scribers



Jan. 15, 1952 J. L. POETZSCH 2,582,275

ADJUSTABLE LETTERING PEN F OR SCRIBERS Filed Jan. 9, 1950 2 SHEETS-SHEET l m w' I za I9 2,2

27 \i 24 I mp /3.2, 23

J5, ATTORNEY Jan. 15, 195.2 J. L. POETZSCH 2 SHEETS-SHEET 2 Fwma 5930 @255; oz

EMEBN ETIE $83 250 5.35% l zw ZZQFZ m zou Patented Jan. 15, 1952 ADJ U STABLE LETTERING PEN FOR 'SCRIBERS James L. .Poetzsch, Baltimore, Md. Application January 9, 1950, Serial No.'137,499

(Granted under the act of March 3, 1883, as

4 Claims.

amended April .30, 1928; .370 0.. G. .757)

The invention described herein, if patented, may be manufactured and used by or for the Government for governmental purposes, without thepayment tome of any royalty thereon.

This invention relates to an adjustable lettering pen forscribers, andmore particularly to a lettering pen of the character described which is adjustable to deliver strokes of predetermined Width for the production of shaded lines.

Scribers for use with templates, who used by 'dra'ftsmen, etc, are well known and described, for instance, :in U. S. Patents No. 2,011,195, Keuifel and 2,050,058, Keuifel. These scribers are provided with a tracer pen, apivot point and a tubular lettering pen. The conventional lettering pen delivers a stroke of a width corresponding to the perimeter of its circular delivery nozzle; whenever it :is desired to produce letters of varying width, another pen has to be employed. Heretofore, it has been impossible to produce shaded. lines with the scribers and lettering pens of the :foregoing type, inasmuch as it isnot practical to use one pen for the shaded vertical stroke of a letter and :a different pen for the non-shaded horizontal portion of the same letter.

.Itis therefore an object of the present invention to provide .a lettering pen for use with 'scribers of the character described, capahleof :de-

-1iveringshaded letters, wherein the horizontal and vertical strokes are of different prede termined widths.

lAnother object-of the. invention is an attach ment for such a scriber which may be incorporated with the latter in lieu of the conventional lettering pen, without necessitating any structural changes or modifications in the scriber it self.

.A further object of the invention is a lettering pen which is capable of selective adjustment for the delivery of shaded and .non-shaded letters.

Still another object of the invention is the combination of a scriber, a lettering pen havinga delivery nozzle with an elongated non circular perimeter and a dial for indicating the yaw angle of the pen relative to the pen-carrying scriber arm.

Yet another objectof the present invention is a scriber attachment which is of simple structure.

inexpensive to manufacture, and adding only .a nominal cost element to a conventional scriber assembly.

These and other objects of the invention will be more vfully apparent from thefcllowing detailed description of the accompanyingdrawings which illustrate, by way of example, two embodia 2 ments of a .lettering pen adaptedfor association with a scriber and capable of attaining the foregoing advantages.

In the drawings, Figure 1 is a top plan view of a scriber, lettering penand dial, in assembled relation;

Figure 2 is an enlarged top plan view of the pen-carrying scriber arm, as shown in Fig. .1,

showing in detail theassembly therewith of a lettering pen and dial in accordance with my invention;

Figure 3 is a section through Fig. 2, takenalong lines 3-3, showingan embodiment of my lettering pen and dial, partly in elevation and partly in section;

Figure 4 is a bottom plan view of the lettering pen of Fig. 3;

Figure 5 is a view, partly in elevation andpar-tly in section of an alternate embodiment of .my lettering pen which may be substituted for the lettering penshown in Fig. 3;

Figure 6 is a sectional view taken along lines -6-6 on Fig. 5.; I

Figure 7 is a bottom plan view of the lettering pen of Fig. 5; and

Figure 8 illustrates lettering obtainable with conventional lettering pens and lettering obtainable at various settings of a lettering pen in 'acoordance with the presentinvention.

More particularly, and referring first to Fig. 1 (and Figs. 2 and 3 based thereon), reference numeral I I denotesa scriber having a first arm i2 .(-preferably pivoted, as at 13, for the provision of closed? and open settings), .a tracer pin M carried by arm I2, a pivot pin 15, and -a pencarrying arm 1.6. A screw I?! is preferably mounted on .arm 16 for the purpose of spacing lettering pen l8 (about to be described in greater detail) from the paper, if desireci, .for thepurposes more fully set forth in U. S. .Patent .No. 2,050,058 Keuffel. Scriber-arm i 6 is further provided with a first aperture l9 locatednear its end and normal to the longitudinal axis of the scriber tail in Figs. 3 and 4, it will be seen that its-mechanical parts are of the general construction 'w ays downwardly, and a light non-shaded stroke when moving sideways. Conversely, if the setting of my pen is changed 90 in a manner about to be described, its downward stroke will be light and non-shaded, and its sideways stroking will be heavy and shaded. I have found that the width of the stroke is independent of the geometric configuration of the inner bore or orifice 24 which thus may be preferably rounded for ease of manufacture. Cleaning rod 25, whose tip 26 interfits with orifice 24 is of conventional construction, including its enlarged central portion 21 which is provided with grooves 28 for the passage of ink from reservoir 29 at the upper portion of pen [8.

In order to adjust the yaw angle of the pen l8 relative to scriber arm I6 for the purpose of giving a predetermined width to the stroke delivered by non-circular delivery nozzle 23, there is provided a dial 30 having a substantially cen tral aperture 3| (for alignment with aperture I in scriber arm I6) and indicia 32, 32' radially arranged around aperture 3|. The tubular body of lettering pen I8 is likewise provided with indicia means, such as notch 33 which registers with a setting selected from indicia 32, 32' of dial 30. While dial 30 may be made integral with scriber arm l5 by soldering or brazing, and while it is even possible to etch the indicia 32, 32' on the end portion of scriber arm 26 itself, I prefer dial 30 to be a separate part which is nonrotatably connected to scriber arm l6 by a lug 34 which radially extends from the periphery of the dial and interfits with aperture 20 in scriber arm Hi; When lettering pen I8 is inserted through aperture 3| of dial 30 and through aperture 19 of scriber arm 16 and clamped in place by the tightening of set screw 21, dial 30 is likewise clamped in place.

While the operation of my device is believed to be sufiiciently clear from the foregoing description of its preferred embodiment, it should be stated that by selecting an appropriate setting,

e. g., setting 2 (see Fig. 2), whereby the noncircular delivery nozzle 23 of pen I8 is placed at a 45 yaw angle relative to the scriber arm IS, the lettering pen is made to deliver a stroke which has the same width regardless of whether the pen is moved vertically (down or up) or side- On the other hand, with setting 1, the up and down strokes of the pen are heavily shaded (while the sideways strokes are light), while in setting 3, the sideways strokes are shaded and the up and down strokes are light. The appearance of the strokes may be further varied by adjusting the closed and "opened settings of the scriber by regulating the angle of arm 12 in a conventional manner; thus,

'in the closed setting of the scriber shown in Fig.1, the letters are upright while in an "open setting (wherein arm 12 is swung further outwardly), are slanted. However, regardless of whether the scriber is set in the "open or -closed position, the relative lightness and heaviness of the vertical and horizontal pen strokes is determined by the predetermined setfrom the rounded bore 24 of the pen shown in Figs. 3 and 4., Cleaning pin 25 is provided with a non-circular elongated tip 36 which interfits with orifice 35. The form of the strokes delivered by this modified pen exactly corresponds to that of the strokes delivered by the pen shown in Figs. 3 to 5. The modified pen, although slightly more difllcult' to make than the preferred form, is useful for certain special applications, e. g. in small-size lettering pens where a round bore in a non-circular nozzle would be too narrow to permit free flow of ink past the tip of the cleaning pin. The setting of the modified pen is likewise accomplished by placing notch 33' in the desired position on the dial.

The term yaw angle as used in the specification and claims denotes the angle between the longitudinal axes of the pen-carrying scriber arm and the non-circular elongated writing surface of the delivery nozzle of my pen.

My lettering pen is capable of association not only with the Keuffel & Esser Company commercial type (as shown e. g. in the above-mentioned Keuffel Patents No. 2,011,195 and 2,050,058), but likewise with other commercial templatecontrolled pantographic scribers, e. g., the scribers made by Eugene Dietzgen Company, and others.

From the foregoing detailed description of my invention, it will be clear to the expert that a lettering pen in accordance with my invention may be associated with a scriber of conventional construction so as to produce shaded letters by adjustment of the yaw angle between the pen and pen-carrying scriber arm. Variations in size of pen and/ or dial, reversals of the relative position of parts (e. g. inscribing the number of settings on the pen body in lieu of a simple notch), and other obvious modifications are deemed within'the spirit of my invention and are comprised within its scope as defined by the appended claims. Thus, the foregoing description of my invention and its illustration in the appended drawings serve by way of example and not as limitation, while I desire that the scope of my invention be determined by the appended claims.

I claim:

1. Scriber attachment comprising in combination: a dial, means for non-rotatably connecting said dial to a scriber arm, said dial having a central aperture and a plurality of indicia surrounding said aperture, and a lettering pen insertable in said aperture for mounting on said scriber arm at a plurality of predetermined angles relative to said scriber arm, said pen comprising a tubular body, a delivery nozzle having an elongated non-circular perimeter, and indicia means on said body registrable with said indicia on said dial for indicating the angle of said pen relative to said arm; whereby'said pen delivers vertical and horizontal strokes of predetermined widths corresponding to the predetermined angle indicated by said indicia means.

2. In a scriber: a scriber arm having an aperture normal to its longitudinal axis, indicia surrounding said aperture, and a lettering pen insertable in said aperture at a plurality of predetermined yaw angles relative to said arm, said pen comprising a tubular body, a delivery nozzle having an elongated non-circular perimeter, and indicia means on said body registrable with said indicia on said arm for indicating the yaw angle of said pen relative to said arm; whereby said pen delivers vertical and horizontal strokes of predetermined widths corresponding to the predetermined yaw angle indicated by said indicia means. I

3. Ina scriber: a scriber arm having an aperture normal to its longitudinal axis, an apertured dial non-rotatably connected to said scriber arm, indicia radially arranged on said dial around the aperture in said dial, and a lettering pen insertable through said dial in said aperture at a plurality of predetermined yaw angles relative to said arm, said pen comprising a tubular body, a delivery nozzle having a non-circular perimeter, and indicia means on said body registrable with said indicia on said dial for indicating the yaw angle of said pen relative to said arm; whereby said pen delivers vertical and horizontal strokes of predetermined widths corresponding to the predetermined yaw angle indicated by said indicia means.

4. Ina scriber: a scriber arm having a first aperture normal to its longitudinal axis and a second aperture longitudinally spaced from said a first aperture; an apertured dial, indicia radially arranged on said dial around the aperture in said dial, a lug extending from said dial into engagement with said second aperture in said arm, said lug being of sufficient length to register said apertured dial with said first aperture in said arm; and a lettering pen insertable through said dial into said first aperture at a plurality of prede- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Germany Apr. 22, 1922 

